X4043S8IZ-2.7

Supervisors Overview

The X4043S8IZ-2.7 is a voltage supervisory circuit manufactured by Renesas Electronics Corporation, designed for CPU supply monitoring and reset control. It integrates a watchdog timer and a 4K I2C EEPROM within a single package to reduce system cost. The device operates with a threshold voltage range of 2.7 V to 5.5 V and features an active low, open drain output. It includes a fixed reset delay time of 400 ms and supports industrial temperature ranges from -40°C to +85°C. The component utilizes an MSOP-8 surface mount package and draws a typical operating current of 3 mA.

Supervisors Feature Summary

• Integrates CPU supervision, watchdog timer, and 4K I2C EEPROM in one package
• Provides active low open drain reset output with selectable watchdog functionality
• Supports wide supply voltage thresholds from 2.7 V to 5.5 V
• Operates reliably across the full industrial temperature range

Supervisors Applications

• CPU power supply monitoring in embedded systems
• System reset control with integrated non-volatile memory
• Industrial equipment requiring watchdog timer protection
• Portable devices utilizing low voltage supervision

Supervisors Procurement Notes

Verify the exact suffix configuration against official datasheets to ensure correct voltage threshold and package type. Confirm RoHS compliance status as manufacturing updates may occur. Check availability status since some variants are discontinued. Ensure the supplier provides genuine Renesas products with proper traceability documentation for quality assurance.

Supervisors Selection Notes

Select this component when system design requires combined voltage supervision and data storage capabilities. The integrated EEPROM eliminates external memory requirements, simplifying PCB layout. Verify that the 2.7 V threshold aligns with the target microcontroller's reset requirements. Consider the MSOP-8 package constraints for thermal management and board space limitations in compact designs.

Supervisors Part Context

This part belongs to the X4043 series of supervisory circuits from Renesas. The series combines power management functions with serial EEPROM memory to provide comprehensive system protection. Similar parts include the X5043 series which uses SPI interface instead of I2C. The family targets applications needing reliable reset generation alongside data retention during power fluctuations.

Supervisors Replacement Considerations

Public confirmed substitute: X4043M8IZ-2.7T1. This variant offers identical electrical characteristics but comes in tape and reel packaging rather than tube. Verify pin compatibility and ensure the replacement matches the required operating temperature range and package dimensions for direct substitution.